A CFP module is a pluggable optical transceiver engineered for high-speed networking applications such as Ethernet, OTN (Optical Transport Network), and SONET/SDH. Form factor: Larger than SFP or QSFP, optimized for high power and long-haul optics. The C form-factor pluggable (CFP, 100G form factor pluggable, where C is Latin: centum "hundred") is a multi-source agreement to produce a common form-factor for the transmission of high-speed digital signals. Supported speeds: 40G, 100G, and up to 400G. Cisco offers a comprehensive range of pluggable optical modules in the Cisco ONS pluggables portfolio. The wide variety of modules gives you flexible and cost-effective options for all types of interfaces. CFP is an acronym for 100G (C = 100 in Roman numerals; Centum) Form factor Pluggable.